Billboard rates TV's best and worst musical performances.
Bleachers on Conan
Rollicking through "Rollercoaster" alongside mini doppelgangers, the side project of Fun's Jack Antonoff reached delirious heights of amusement -- a rush of a ride worth taking again.
FKA Twigs on The Tonight Show Starring Jimmy Fallon
Making her U.S. TV debut, the English singer dazzled with her mysterious allure. Her sultry dance also captivated Fallon, who exclaimed, "I've never seen anything like that before!"